|
GB285430A
|
|
Light pressure-resisting casing, especially for armoured diving suits
|
|
DE453247C
|
|
Spring-loaded socket
|
|
GB262059A
|
|
Improvements in instruments or apparatus comprising casings and sensitive elements such as diaphragms retained in such casings
|
|
GB257271A
|
|
Telephone with free vibrating diaphragm surface
|
|
DE462666C
|
|
Electromagnetic relay, especially for switching on a shunt to a power consumer
|
|
DE463282C
|
|
Hydraulic regulator, especially for regulating electrical quantities
|
|
US1589823A
|
|
Telephone receiver
|
|
DE454275C
|
|
Loudspeaker phone with a special anchor coupled to the center of the membrane
|
